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Pension and Severance Benefits (Tables)
 6 Months Ended
Jun. 30, 2014
Compensation and Retirement Disclosure [Abstract]  
Schedule of Defined Benefit Plans Disclosures
Net pension expense from our defined benefit and severance plans are primarily comprised of severance plans covering Central American employees and consists of the following: 
 
Quarter Ended June 30,
 
Six Months Ended June 30,
(In thousands)
2014
 
2013
 
2014
 
2013
Service cost
$
1,855

 
$
1,864

 
$
3,710

 
$
3,728

Interest on projected benefit obligation
1,440

 
1,297

 
2,830

 
2,594

Expected return on plan assets
(341
)
 
(331
)
 
(671
)
 
(663
)
Recognized actuarial loss
264

 
306

 
532

 
612

Amortization of prior service cost
32

 
32

 
64

 
64

Defined benefit and severance plan expense
$
3,250

 
$
3,168

 
$
6,465

 
$
6,335